US3963789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydric alcohol production using RU on clay supports
Assignee: Individual
•
Filing: 1974-12-12
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Granted: 1976-06-15
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Expires: 1994-12-12
Abstract
Abstract Process for the conversion of carbohydrates to polyhydric alcohols. Carbohydrates, such as glucose and cornstarch hydrolyzate, are converted to polyhydric alcohols by hydrogenation at high pressure in the presence of a catalyst comprising ruthenium on a crystalline aluminosilicate clay. The clay is preferably acid treated and calcined prior to impregnation with ruthenium. Clays containing a major proportion of montmorillonite are preferred.
Inventors
- 👤 Walter M. Kruse
- 👤 Leon W. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:14
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/26; B; B01; B01J; B01J21/00; B01J21/16; B01J23/00; B01J23/38; B01J23/40; B01J23/46; B01J23/462; B01J29/00; B01J29/04; B01J29/049; B01J2229/00; B01J2229/30; B01J2229/42; Y; Y02; Y02P; Y02P20/00; Y02P20/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
123 words
A process for the production of a polyhydric alcohol or mixture thereof which comprises contacting an essentially water soluble polysaccharide-containing carbohydrate in aqueous medium with hydrogen at a temperature in the range of about 100° to about 200° C., a pressure of at least about 100 psig, and a pH in the range of about 2.5 to about 4.5, in the presence of a catalyst comprising ruthenium wherein the catalyst contains about 0.1% to about 5% by weight of ruthenium, based on the total catalyst weight, an acid activated crystalline aluminosilicate clay having base exchange capacity and having a layer structure comprising a plurality of sheet-like layers, said layers including at least one tetrahedral silica layer and at least one octahedral alumina layer.
Claim 2
Dependent Claim
123 words
A process for the production of a polyhydric alcohol or mixture thereof which comprises contacting an essentially water soluble polysaccharide-containing carbohydrate in aqueous medium with hydrogen at a temperature in the range of about 100° to about 200° C., a pressure of at least about 100 psig, and a pH in the range of about 2.5 to about 4.5, in the presence of a catalyst comprising ruthenium wherein the catalyst contains about 0.1% to about 5% by weight of ruthenium, based on the total catalyst weight, an acid activated crystalline aluminosilicate clay having base exchange capacity and having a layer structure comprising a plurality of sheet-like layers, said layers including at least one tetrahedral silica layer and at least one octahedral alumina layer.
Claim 3
Dependent Claim
15 words
A process according to claim 1 in which said clay is acid treated and calcined.
Claim 4
Dependent Claim
15 words
A process according to claim 1 in which said clay has high cation exchange capacity.
Claim 5
Dependent Claim
16 words
A process according to claim 1 in which said clay comprises a major proportion of montmorillonite.
Claim 6
Dependent Claim
17 words
A process according to claim 1 in which said carbohydrate is a hydrolyzate of starch of cellulose.
Claim 7
Dependent Claim
14 words
A process according to claim 5 in which said hydrolyzate is a starch hydrolyzate.
Claim 8
Dependent Claim
17 words
A process according to claim 1 in which the reaction time is at least about 0.5 hour.
Claim 9
Dependent Claim
25 words
A process according to claim 1 in which the reaction temperature is at least about 170°C during at least a portion of the reaction period.
Claim 10
Dependent Claim
50 words
A process according to claim 8 in which the reaction is carried out in two stages, the first stage being carried out at a temperature in the range of about 100° to about 175°C. and the second stage being carried out at a temperature of about 170° to about 200°C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |